用于python脚本的shell启动/停止 [英] shell start / stop for python script

问题描述

我有一个简单的python脚本，我需要启动和停止，我需要使用start.sh和stop.sh脚本来执行此操作.

I have a simple python script i need to start and stop and i need to use a start.sh and stop.sh script to do it.

我有start.sh:

I have start.sh:

#!/bin/sh

script='/path/to/my/script.py'
echo 'starting $script with nohup'

nohup /usr/bin/python $script &

和stop.sh

#!/bin/sh

PID=$(ps aux | grep "/path/to/my/script.py" | awk '{print $2}')
echo "killing $PID"
kill -15 $PID

我主要关注stop.sh脚本.我认为这是找到pid的一种适当方法，但我不会对此押注太多. start.sh成功启动它.当我运行stop.sh时，我无法再通过"ps aux | grep 'myscript.py'"找到该进程，但控制台将输出:

I'm mainly concerned with the stop.sh script. I think that's an appropriate way to find the pid but i wouldn't bet much on it. start.sh successfully starts it. when i run stop.sh, i can no longer find the process by "ps aux | grep 'myscript.py'" but the console outputs:

killing 25052
25058
./stop.sh: 5: kill: No such process

因此似乎可以正常工作，并显示没有这样的过程"的错误提示.

so it seems like it works AND gives an error of sorts with "No such process".

这实际上是错误吗?我是否以一种理智的方式来处理这个问题?还有其他我应该注意的事情吗?

Is this actually an error? Am I approaching this in a sane way? Are there other things I should be paying attention to?

编辑-我实际上得到了这样的内容: start.sh

EDIT - I actually ended up with something like this: start.sh

#!/bin/bash
ENVT=$1
COMPONENTS=$2


TARGETS=("/home/user/project/modules/script1.py" "/home/user/project/modules/script2.py")
for target in "${TARGETS[@]}"
do
      PID=$(ps aux | grep -v grep | grep $target | awk '{print $2}')
      echo $PID
      if [[ -z "$PID" ]]
      then
              echo "starting $target with nohup for env't: $ENVT"
              nohup python $target $ENVT $COMPONENTS &
      fi
done

stop.sh

#!/bin/bash
ENVT=$1

TARGETS=("/home/user/project/modules/script1.py" "/home/user/project/modules/script2.py")
for target in "${TARGETS[@]}"
do
     pkill -f $target
     echo "killing process $target"
done

推荐答案

这是因为ps aux |grep SOMETHING还会找到grep SOMETHING进程，因为有些东西匹配.执行完grep后，因此找不到它.

It is because ps aux |grep SOMETHING also finds the grep SOMETHING process, because SOMETHING matches. After the execution the grep is finished, so it cannot find it.

添加一行:ps aux | grep -v grep | grep YOURSCRIPT

其中-v表示排除. man grep中的更多内容.

Where -v means exclude. More in man grep.

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